From: Kyrylo Tkachov <kyrylo.tkachov@arm.com>
Date: Fri, 12 Mar 2021 13:18:00 +0000 (+0000)
Subject: aarch64: Set AARCH64_EXTRA_TUNE_PREFER_ADVSIMD_AUTOVEC for Neoverse N2
X-Git-Tag: releases/gcc-10.3.0~226
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b2b194695f08cb04d8c5602f0cc32311155242fa;p=thirdparty%2Fgcc.git

aarch64: Set AARCH64_EXTRA_TUNE_PREFER_ADVSIMD_AUTOVEC for Neoverse N2

This patch tweaks the Neoverse N2 tuning on the GCC 10 branch to have it
in line with GCC 8 and 9 to prefer AdvancedSIMD over SVE for
auto-vectorisation.

gcc/ChangeLog:

	* config/aarch64/aarch64.c (neoversen2_tunings): Set
	AARCH64_EXTRA_TUNE_PREFER_ADVSIMD_AUTOVEC tune_flags.
---

diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 775f79d88ff8..5bd5c458ae04 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -1430,7 +1430,7 @@ static const struct tune_params neoversen2_tunings =
   2,	/* min_div_recip_mul_df.  */
   0,	/* max_case_values.  */
   tune_params::AUTOPREFETCHER_WEAK,	/* autoprefetcher_model.  */
-  (AARCH64_EXTRA_TUNE_NONE),	/* tune_flags.  */
+  (AARCH64_EXTRA_TUNE_PREFER_ADVSIMD_AUTOVEC),	/* tune_flags.  */
   &generic_prefetch_tune
 };